Tile.



- R. S. RHOADS.

TILE.

APPLICATION FILED SEPT, 29. 1913.

Patentd July 6,1915.

Hll

Fae-M. I

RALPH S. RHOADS, OF ST. LOUIS, MISSOURI, ASSIGNOR T0 EVENS AND HOWARD FIRE BRICKCOMPANY, OF'ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

TILE.

Patented July 6, 1915.

' Application filed September 29; 1913. Serial No. 792,424.,

To all whom it may concern:

Be it known that I, RALPH S. RHOADS, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improve- -ment in Tiles, of which the following is'a full, clear, 'and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which I Figure 1 is a perspective view of my improved tile. Fig. 2 is an end elevational view showing two tiles assembled. Fig. 3 is a longitudinal sectional view showing a joint between the ends of two tiles.

This invention relates to a new improve ment in tiles employed in the construction of sewers, chimneys, silos, etc., and while the tiles or blocks are shown as having concavo-convex faces,'-it is obvious that they could have fiat faces for use in the construction of straight, inste ad of curved walls.

The object of my present invention is to construct a tile of the'character described jacent tile.

In the drawings, 1 indicates the inner I wall of the tile, and 2 the outer wall.

3 and 4c are the side walls, the former'having'a'n undercut longitudinally disposed rib, 3, while the latter is provided with a longitudinal dove-tail groove 45, into which the rib 3 fits in the formation of the side joint.

The inner wall 1 extends a short distance beyond the body of the tile at one end as designated by 1, while the opposite end of Q the inner wall terminates a short distance from the vertical plane'occupied by the outer wall 2 and side walls 3 and 4. A comparatively short wall section 1 extendsfrom the inset end of the inner Wall 1 to the vertical plane occupied by the ends of the Walls 2, 3 'and 4, whichwall section 1 is depressed or 1nset with respect to the plane occupied by the inner wall 1, and thus an abrupt shoulder 1 is formed between said inner wall 1 and the short inset wall section 1". This short wall section 1 is practically a continuation of the inner wall 1 and thus such construction not only reinforces and strengthens this end of the tile, but it provides a transversely disposed rabbet or recess which when the two tiles are properly assembled or placed end to end receives the projecting end of the inner wall of an adjacent tile and the mortar or cement'used in joining said tiles. The abrupt shoulder at the inner end of the rabbet not only prevents'the mortar or cement from flowing backward into the hollow space within the tile, but the face of said abrupt shoulder forms a bonding surface for the cement or mortar which surface together with the face of the inset wall section 1 provides ample bonding surface between the end of the tile in which the rabbet is formed and the projecting end 1 of the next adjacent tile. Thus, the inset wall section 1 provides a bonding surface for the mortar or cement, combines with the shoulder between said wall section and the inner wall of the tile to prevent the mortar from flowing into said tile, and further materially strengthens the end of the tile which is provided with the recess or rabbet.

What I claim is:

A transversely curved hollow tile comprising an outer wall, a pair of side Walls,

- an inner wall, one" end of which is extended a short distance at one end of the tile and the opposite end terminating a short distance from the corresponding ends of the outer and side walls, a short wall section extending from the inset end of the inner wall to the corresponding ends of the side stantial body of mortar when a pair of the signature in the re'sence of two witnesses, 1 tiles are united, there being a longitudinally this 25th day-of geptember, 1913.

extending under-cut groove formed in the outer face of one of the side Walls of the I v RHOADS 5 tile; and a dove-tailed rib formed on the Witnesses; outer face of the other side wall. M. P." SMITH In testimony whereof I hereunto aflix my M. A. HANDELC. 

